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handling special Le's for encryption in iso SM driver

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This commit is contained in:
Frank Morgner
2013-02-01 00:37:29 +01:00
parent e3947061c4
commit 9f6ffc2fad
2 changed files with 11 additions and 12 deletions
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10
npa/src/npa.c
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@@ -329,15 +329,7 @@ int read_binary_rec(sc_card_t *card, unsigned char sfid,
}
*ef_len = 0;
if (read > SC_MAX_APDU_BUFFER_SIZE-2
|| (card->sm_ctx.sm_mode == SM_MODE_TRANSMIT
&& read > (((SC_MAX_APDU_BUFFER_SIZE-2
/* for encrypted APDUs we usually get authenticated status
* bytes (4B), a MAC (11B) and a cryptogram with padding
* indicator (3B without data). The cryptogram is always
* padded to the block size. */
-18) / iso_sm_ctx->block_length)
* iso_sm_ctx->block_length - 1)))
if (read > 0xff+1)
sc_format_apdu(card, &apdu, SC_APDU_CASE_2_EXT,
ISO_READ_BINARY, ISO_P1_FLAG_SFID|sfid, 0);
else